Brooks Adrenaline GTS 21 running shoes in black and silver. These performance sneakers feature DNA LOFT cushioning for a smooth ride and GuideRails support technology to keep excess movement in check. The breathable engineered mesh upper provides a secure fit, while the durable rubber outsole offers reliable traction for road running. Note: There is a visible wear hole in the interior heel lining of one shoe and some marking on the outsoles as pictured.